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Page 11 of 24 

Pegasus R Iss.07 – 08/13 

CALIBRATION USING THE TEMPERATURE INDICATED ON THE 
CONTROLLER 

 

1. 

Remove the Pegasus 'R' from its case and visually inspect it for any damage it may have sustained since it was 

last used.  Insert the black body source assembly (see fig 970-20-02) into the furnace tube with the ceramic 

insulators.   

 

2. 

Connect the Pegasus 'R' to a suitable power supply and set the controller to the required temperature (see 

the controller's manual for details and Fig 1). 

 

3. 

Wait for the temperature to stabilise. 

 

4. 

When the temperature indicated by the controller and the output of the thermometer are both stable (see 

specification for typical values) record three sets of readings over a period of about six minutes.  Check that 

these readings are consistent and then calculate their average values. 

 

5. 

The Pegasus 'R' has itself been calibrated, correct the average values accordingly.   

 

6. 

Reset the controller and/or repeat the calibration for another thermometer. 

 
7. 

When the calibration is complete, reset the controller to 0 C and wait until the unit has cooled to below 
400 C before moving the Pegasus to a new location.  The Pegasus must be cooled to about 100 C before it 

can be put back into its carrying case.  

 

 

 

 

Содержание Pegasus R 970

Страница 1: ... 543830 Fax 44 0 1704 544799 Internet www isotech co uk E mail info isotech co uk The company is always willing to give technical advice and assistance where appropriate Equally because of the programme of continual development and improvement we reserve the right to amend or alter characteristics and design without prior notice This publication is for information only ...

Страница 2: ...ADIATION PYROMETERS 12 INTRODUCTION 12 Setting up the Source 12 Using the Source 12 Requirements for an Optical Bench See Figure 19071 12 A Typical Calibration Evaluation of an Industrial Pyrometer 13 DESCRIPTION 13 BACK FORTH 13 HEIGHT 13 LATERAL MOVEMENT 13 METHOD 14 Evaluation of the Optical Bench 14 Audit Calibration 15 Table 1 Calibration Results 16 USING THE PC INTERFACE 17 CONNECTIONS 17 CA...

Страница 3: ...SS PARTS ARE NOT COVERED BY THIS GUARANTEE INTERFERENCE WITH OR FAILURE TO PROPERLY MAINTAIN THIS INSTRUMENT MAY INVALIDATE THIS GUARANTEE RECOMMENDATION The life of your ISOTECH Instrument will be prolonged if regular maintenance and cleaning to remove general dust and debris is carried out ISOTHERMAL TECHNOLOGY LTD PINE GROVE SOUTHPORT PR9 9AG ENGLAND TEL 44 0 1704 543830 544611 FAX 44 0 1704 54...

Страница 4: ... PERSONNEL FAMILIAR WITH GOOD MEASUREMENT PRACTICES IT IS EXPECTED THAT PERSONNEL USING THIS EQUIPMENT WILL BE COMPETENT WITH THE MANAGEMENT OF APPARATUS WHICH MAY BE POWERED OR UNDER EXTREMES OF TEMPERATURE AND ARE ABLE TO APPRECIATE THE HAZARDS WHICH MAY BE ASSOCIATED WITH AND THE PRECAUTIONS TO BE TAKEN WITH SUCH EQUIPMENT ...

Страница 5: ...oured green yellow MUST be connected to a suitable earth The blue conductor should be connected to Neutral and the Brown conductor to Live Line Warning Internal mains voltage hazard Do not remove the panels There are no user serviceable parts inside Contact your nearest Isotech agent for repair Voltage transients on the supply must not exceed 2 5kV Conductive pollution e g Carbon dust must be excl...

Страница 6: ...e apparatus when it has hot or cold unless wearing the appropriate protective clothing and having the necessary training 6 Do not drill modify or otherwise change the shape of the apparatus 7 Do not dismantle the apparatus 8 Do not use the apparatus outside its recommended temperature range 9 If cased do not return the apparatus to its carrying case until the unit has cooled 10 There are no user s...

Страница 7: ...www isotech co uk if you require more information about our other products UNPACKING AND INITIAL INSPECTION Our Packing Department uses custom designed packaging to send out your unit but as accidents can still happen in transit you are advised after unpacking the unit to inspect it for any sign of shipping damage and confirm that your delivery is in accordance with the packing note If you find an...

Страница 8: ...a a solid state relay A fan runs continuously and cools the electronics in the instrument OPERATION Altering the Furnace Temperature Set point 1 Switch on The controller will briefly show its software version before displaying an indication of the block temperature 2 Momentarily press either the UP or DOWN key once to display the setpoint desired temperature 3 To alter the value press and hold the...

Страница 9: ...drawing below 1 Ensure furnace is cool 2 Slide the long ceramic insulator 970 01 03C down the furnace tube so that it rests on the base 3 Carefully lower the smaller ceramic 970 01 03B inside the furnace to rest on the lower ceramic 4 Load the blackbody 970 01 02 with the reference thermocouple installed 970 20 01 5 Finally add the upper top ceramic insulator 970 01 03A ...

Страница 10: ...es to this value For the R place a thermometer in the source and connect it to the suitably configured see R procedure indicator Confirm that the indicator agrees within a few degrees of the controller Your unit should have performed as described above and can now be used for calibration If any problems or faults arise during these tests please contact us or our agents for help and advice WARNING ...

Страница 11: ...e to stabilise 4 When the temperature indicated by the controller and the output of the thermometer are both stable see specification for typical values record three sets of readings over a period of about six minutes Check that these readings are consistent and then calculate their average values 5 The Pegasus R has itself been calibrated correct the average values accordingly 6 Reset the control...

Страница 12: ... which sits in the groove in the insulation piece The thermocouple is connected to an indicator situated on the front of the Pegasus R as shown on figure 1 The size and shape of the insulation and the position of the thermocouple are all important and if the assembly is modified the calibration certificate may become invalid Having assembled the Pegasus R a temperature is set see commissioning lat...

Страница 13: ...ated target is used as the source of information together with the certificate of calibration see ref NPL 12317 91 001 dated 15 05 1991 An optical bench was built see drawing 19071 which allowed an optical pyrometer to be calibrated The optical bench allowed 3 freedom of movements BACK FORTH The distance to the optical pyrometer transfer standard from the rear of the Black Body is 750mm An optical...

Страница 14: ...ings were obtained OPTICAL PYROMETER READING 650mm from rear of target to optical pyrometer 750mm 850mm 984 983 983 b At a distance of 750mm The focal length of the optical pyrometer was changed METRES FOCAL LENGTH READING 75 8 85 9 983 983 983 983 c The height of the optical pyrometer was altered READING C 2mm Normal 2mm 982 983 982 d The lateral position of the optical pyrometer was adjusted and...

Страница 15: ...meter was placed in its holder as shown in fig 19071 The controller temperature the indicated source temperature and the optical pyrometer temperatures were noted From the calibration certificate the radiance temperature was calibrated The difference between the radiance temperature and the optical pyrometer temperature gives the error of the optical pyrometer reading within the uncertainty stated...

Страница 16: ...ults PEGASUS R CONTROLLER TEMP C T C INDICATED TEMP SOURCE OPTICAL PYROMETER READING C RADIANCE TEMP READING CORRECTED FROM NPL CERT C Standard 220 222 220 226 Standard 440 442 438 448 8 Standard 660 660 656 662 Standard 800 797 793 795 Standard 1000 991 986 981 ...

Страница 17: ... chained together The benefit of this approach is that a number of calibration baths may be connected together in a daisy chain configuration and then linked to a single RS232 see diagram Note The RS 422 standard specifies a maximum lead length of 1200M 4000ft A true RS422 port will be required to realise such lead lengths The Isotech conversion leads are suitable for maximum combined lead lengths...

Страница 18: ... indicator such as the milliK or TTI 10 The software requires Windows 9X XP a minimum of 5Mb of free hard drive space and free serial ports for the instruments to be connected DEVELOPMENT Cal NotePad was developed by Isothermal Technology using LabVIEW from National Instruments The license details are shown on the download page and in the Cal Notepad manual ...

Страница 19: ...ch will install the application a user manual with setup information and the necessary LabVIEW run time support files 5 Should you ever need to uninstall the software then use the Add Remove Programs option from the Control Panel PROTOCOL The instruments use the Modbus Protocol If required e g for writing custom software the technical details are available from our Document Library at http www iso...

Страница 20: ...Page 20 of 24 Pegasus R Iss 07 08 13 FIGURE 1 PEGASUS R PANEL LAYOUT AND FUNCTIONS 1 T C SOCKET 2 INDICATOR 3 CONTROLLER 4 CALIBRATION AREA ...

Страница 21: ...Page 21 of 24 Pegasus R Iss 07 08 13 FIGURE 19071 ...

Страница 22: ...Page 22 of 24 Pegasus R Iss 07 08 13 ...

Страница 23: ...Page 23 of 24 Pegasus R Iss 07 08 13 ...

Страница 24: ...pect Do not use the unit contact Isotech or your agent WARM UP TIME UNUSUALLY LONG Controller set incorrectly failure of one heater or cooling fan permanently on Check controller settings The fan on the side panel should always be on INDICATOR MISBEHAVES S ONLY Wrong configuration code entered check against table If SnSr FAIL is displayed check probe connections If displayed with no probe connecte...

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